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Chevron Groundwater Monttonng Report(4Q200 E) Page 2 of 2 <br /> 1 acilrty tl9-2033—508 Wcst Charter Way,Stockton CA Date February 28 2002 <br /> �1 <br /> DISCUSSION: <br /> Gettler-Ryan Inc performed this groundwater monitoring and sampling event for groundwater monitoring wells <br /> MW-1, M W-2 and MW-3 on December 6, 2001 Each groundwater sample was analyzed for total petroleum <br /> hydrocarbons as gasoline(TPHg), benzene,toluene,ethyl benzene and xylenes (BTEX), and methyl tertiary butyl <br /> ether(MtBE) Groundwater from monitoring well MW-1 was also analyzed for total petroleum hydrocarbons as <br /> diesel (TPHd), MtBE (confirmation)by EPA Method 8260B, purgeable halocarbons by EPA Method 8021, semi- <br /> volatile organics by EPA Method 8270,total recoverable petroleum hydrocarbons(TRPH) by American Public <br /> Health Association (APHA)/EPA Methods and dissolved metals including cadmium, chromium, nickel, lead and <br /> zinc by EPA Method 200 <br /> The laboratory results for the sample collected from MW-I reported TPHd 970 dig/l, TPHg at 130 µg11 , Benzene at <br /> 1 5 µg/l, and MtBE (confirmation)at 950 pg/l No other target analytes in MW-I were detected No target analytes <br /> were detected in samples from MW-2 Laboratory results for the sample collected from MW-3 detected TPHg at a <br /> concentration of 12,000 �tg/l, and benzene at a concentration of 150 µg/l <br /> Groundwater elevations generally decreased across the site when compared with the previous monitoring event <br /> Groundwater flow was to tl}e northeast at 0 009 ft/ft <br /> LIMITATIONS <br /> rhe findings presented in this letter are based on data and interpretations provided by Gettler-Ryan, Inc Gettler- <br /> Ryan's report is attached The data presented in this summary is accurate only to the degree implied by the sources <br /> and methods used No warranty, expressed or implied, is made by SECOR <br /> If you have any questions, please feel free to call us at(916) 861-0400 <br /> Sincerely, <br /> Sol <br /> ECOR Inter nal Inc <br /> t able <br /> Senior Geologist <br /> ATTACHMENTS <br /> • Attachment A—January 14, 2001 Groundwater Monitoring & Sampling Report by Gettler-Ryan Inc <br /> cc Bob Cochran, Chevron Products Company, P O Box 6004, San Ramon,CA 94583-0804 <br /> Marty Hartzell, RWQCB—CVR, 3443 Routier Road, Suite A, Sacramento, CA 95827 <br /> Pearl Myer, 1 120 South Hunter Street, Stockton, CA 95206 <br /> i� <br />